Example SDLTridion Workflow Activity

MyCustomExternalActivity.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//This gives us StreamReader
using System.IO;
//This gives us the Data Contract info from the client
using Tridion.ContentManager.CoreService.Client;
//This gives us the core service methods and properties
//  specific to workflow: must reference Tridion.ContentManager.CoreService.Workflow from 
//  bin/client directory
using Tridion.ContentManager.CoreService.Workflow;

//Required for logging!
using Tridion.Logging;
using System.Xml.Linq;

namespace TridionWorkflowAssembly
{
        public class MyCustomExternalActivity : ExternalActivity
        {
            protected override void Execute()
            {
                ActivityFinishData finishData = new ActivityFinishData()
                { 
                    Message = String.Format("My custom External Activity finished at: {0}", DateTime.Now.ToShortDateString())
                };
                CoreServiceClient.FinishActivity(ActivityInstance.Id, finishData, new ReadOptions());
            }
        }

    }

PublishStagingActivity.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//This gives us StreamReader
using System.IO;
//This gives us the Data Contract info from the client
using Tridion.ContentManager.CoreService.Client;
//This gives us the core service methods and properties
//  specific to workflow: must reference Tridion.ContentManager.CoreService.Workflow from 
//  bin/client directory
using Tridion.ContentManager.CoreService.Workflow;

//Required for logging!
using Tridion.Logging;
using System.Xml.Linq;

namespace TridionWorkflowAssembly
{
    public class PublishStagingActivity : ExternalActivity
    {
        protected override void Execute()
        {
            //PublishInstructionData (interface: IExtensibleDataObject) requires
            //  reference to System.Runtime.Serialization
            PublishInstructionData publishInstruction = new PublishInstructionData();
            publishInstruction.ResolveInstruction = new ResolveInstructionData();
            publishInstruction.RenderInstruction = new RenderInstructionData();
            //Needed for publishing workflow revision/version
            publishInstruction.ResolveInstruction.IncludeWorkflow = true;
            
            ActivityInstanceData activityInstance = ActivityInstance;
            IList<String> itemsToPublishList = new List<String>();
            //Staging publication target URI
            String[] targets = new[] { "tcm:0-1-65537" };

            foreach (WorkItemData wid in activityInstance.WorkItems)
            {
                int value = Convert.ToInt32(Enum.Parse(typeof(ItemType), "VirtualFolder"));
                //Brute-force bundle identification
                if (wid.Subject.IdRef.EndsWith(value.ToString()))
                {
                    itemsToPublishList.Add(wid.Subject.IdRef);
                }                    
            }

            //PublishTransactionData requires reference to System.ServiceModel
            PublishTransactionData[] publishTransactions = CoreServiceClient.Publish(itemsToPublishList.ToArray<String>(), publishInstruction, targets, PublishPriority.Normal, null);
            //Store the publish transaction id so that we can undo if needed!
            ProcessInstance.Variables.Add("PublishTransaction", publishTransactions[0].Id);
            
            CoreServiceClient.FinishActivity(ActivityInstance.Id, new ActivityFinishData { Message = "Publish to Staging Queued: Finished Activity" }, null);
            //base.Execute() calls "finish activity" 
            // which is still necessary
            //base.Execute();
        }
    }
}

WireUp.cs

AssemblyTbbId = "/webdav/200%20Website/Building%20Blocks/Path/To/Your/Assembly.tbbasm"
Type = "YourNameSpace.YourClassName"